Yesterday spent 10-hours continuous to finish off A-spec 9-hours Tsukuba endurance.
Half-way lead by 34 laps. Then took 15 min bath in middle and lost 12 laps, down to 22.
Final lead by 33 laps again, so last 30 minutes park at driving line in the middle of the road and block traffic to slow them down from fast lap   

Total 533 laps.
Actual race time 8 hours 15 min.
New tires avg lap 51-53 sec, early braking to preserve tires.
Old tires 53-55 sec, sliding when near bald.
Fastest lap 49.x
Using Audi Le Mans quattro '03
and DS3 

If taruh kaw kaw every lap, tires last 16-18 laps, +1/+2 sec quicker.
If preserve, can last 25-30 laps.
Each pit stop waste about 35-40 seconds (in + out lap)
But only save 20+ seconds, therefore better to preserve.

My eyes are so tired

Can't imagine when to start the 24-hours Sarthe. Need to commit 3 continuous days.